Used my Infriray while house hunting. Possibly saved me big time €. Great also for spotting leaks any water in/on surfaces shows up quite clearly. In the same vein I use it to spot pet accidents.

The infriray is the Chinese knockoff brand which is actually better than flir because they don’t have to follow the US weapons law. So with it I get 30(?) fps instead of the ~5 with flir. Resolution is better too. It’s very sensitive and can clearly show a hand print on a surface for a minute or so even if you only touch it for 1/2 a second.